Preheat oven to 350°F. Cover baking sheets with parchment paper. Set aside. Combine cake mix, melted butter, egg, water and vanilla in large bowl with wooden spoon until blended. Add in chocolate chips and mix. Batter will be thick. Using 2 tbs cookie scoop, scoop cookie dough onto parchment covered baking sheets. Bake 10 to 12 minutes or until set. Cool cookies 1 minute on pan. Cool completely on wire rack.